use gregexpr and paste
> aze <- paste(c("a", "z", "e"), collapse = "")
> sequence <- paste(c("a","z","e","r","t","a","z","a","z","e","c"), collapse =
> "")
> gregexpr(aze, sequence, fixed = TRUE)
[[1]]
[1] 1 8
attr(,"match.length")
[1] 3 3
HTH,
--sundar
On Fri, Jun 5, 2009 at 6:22 AM, Ptit_Bleu<ptit_b...@yahoo.fr> wrote:
>
> Hello,
>
> I'm just looking for an easy way to find the positions of a complete
> sequence in a bigger vector.
> For example :
> c("a","z","e") in c("a","z","e","r","t","a","z","a","z","e","c")
> and the result should be
> 1 8
> that is the positions of the beginning of the complete sequence.
>
> I tried with %in%, match, is.element but all I get is, for example
> which(c("a","z","e") in c("a","z","e","r","t","a","z","a","z","e","c"))
> 1 2 3
> meaning that each character is in the bigger vector.
>
> It must be easy, except for me. Sorry.
>
> If you have a solution, thanks in advance to share it.
> Have a good week-end,
> Ptit Bleu.
>
> --
> View this message in context:
> http://www.nabble.com/find-a-sequence-of-characters-in-a-vector-tp23888063p23888063.html
> Sent from the R help mailing list archive at Nabble.com.
>
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